Reply to post: Re: FPGAs

BBC bypasses Linux kernel to make streaming videos flow

Frumious Bandersnatch Silver badge


Why don't they just use multicast or UDP?

Well the BBC is doing what they're doing because it gives them zero copy and ability to amortise kernel/userland context switches over lots of packets. Cloudflare is tinkering around in a similar way because it allows them to quickly write unprivileged software that will deal with new attack traffic.

UDP-based transmission is all well and good, but the problem these guys are trying to solve is a different one to the one you're thinking of (TCP's reliance on ACKs for flow control, with all that implies).

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